NL8000917A - WALL COVERING MATERIAL. - Google Patents

Description

N / 29.509-St / lb 1> 'Wall cladding material.

The invention relates to a wall covering material with a rear, flame-retaining adjuvant-containing, elastic, gas-permeable foam layer facing the wall when used, and a front, fiber-containing covering layer, which faces the viewer during use, the whole being heat-insulating, sound-absorbing and has flame retardant properties. It is therefore a substantially web-shaped material which can be applied as wallpaper to a wall.

Insulation materials suitable as wall covering, for example styrene foams, have a modest decorative effect, for example through structuring, but no flame-retardant properties. In general, these materials still require a finish, for example by painting or coating, but this generally does not eliminate the pressure sensitivity of the above-mentioned insulating materials, so that protective measures are required in addition to the aforementioned and time-consuming operations.

However, other insulating materials, which are flame-resistant, such as rock wool, have no decorative effect at all. Decorative materials, such as carpets, which also have a certain insulating capacity, are not sufficiently flame-resistant and are so expensive that they only qualify in 25 exceptional cases.

A wall covering material of the type mentioned in the preamble is known from Swiss patent 587,119. The foam layer must thereby have a large, soft-rubber-like recovery capacity in order to be sensitive to pressure. 30 decrease. In order to allow the wall to breathe, the entire wall covering material must be gas permeable.

However, such a wall covering material now has the drawback that, because of the elastic foam material layer, it can lead to uneven and drawn-in seams if the material is of relatively soft construction.

For this reason, a certain rigidity of the foam layer would be desirable, but this can only be done by increasing the 800 0 9 17. * r '- 2 - filler share can be obtained, if the material nevertheless remains pressure-resistant. However, this increase in the filler proportion has the drawback that it reduces the air quantity which can be contained in the foam, which considerably reduces the insulating properties of the material.

The object of the invention is to provide a wall covering material of the type mentioned in the preamble, which, like the said known material, is insulating, sound-absorbing, flame-resistant and decorative and inexpensive to manufacture, so that it is available at a reasonable price required for a wide application. can be stated, but that moreover it can be applied simply and with a straight, inconspicuous seam to a wall, without the deteriorating effect of the material deteriorating as a result.

To this end, the wall-covering material according to the invention is characterized in that hollow foam-like granules of closed-cell inorganic material 20 are incorporated in the foam layer in an open-cell foam.

The closed-cell granules may in particular consist of a type of glass and CaSiO 2. The grain diameter is preferably between 10 and 300 yes.

The weight of these granules can be up to 75% or even more of the dry weight of the foam layer.

The closed-cell granules, while causing a "stiffening" of the foam layer, do not decrease its insulating capacity.

Because the foam itself has open cells, the gas permeability is also retained.

The stiffened foam layer makes it possible to obtain clean seams when applying the wall covering material, but the rubber-like character of the material is sufficiently present.

The desired properties of the foam layer can in particular be obtained with a vulcanized styrene-butadiene latex, wherein as an anti-flame retardant 8000917-3 * aluminum oxide hydrate can be included in the foam.

A suitable foam layer must have a thickness of at least a few millimeters in order to properly meet the requirements with regard to the insulating capacity and the sound absorption capacity, but in many cases the foam layer can also have a smaller thickness.

Said covering layer may in particular consist of a non-woven material, the decorative effect of which can be obtained by structuring and / or coloring the surface, for example by printing. Polyester fiber fleeces, in particular spun fleeces of endless polyester fibers, which are entangled, slightly punctured with needles and impregnated are particularly suitable. In addition, such a fleece must have a sufficiently high weight per m, for instance more than 100 g, and must be so loose that it resembles paper as little as possible. Such a web can, for example, have a thickness in the order of a millimeter, it advantageously having a stiffness which corresponds approximately to that of a soft cardboard. Such a fleece in combination with the described foam material leads to an ideal wall covering, wherein the fleece itself can be made flame-resistant or made by suitable additives or by a suitable choice of fibers. Often, however, the flame retardancy of the foam is sufficient to make a polyester web also sufficiently flame retardant.

In the said polyester nonwovens, fibers of 10-20 µm thickness are advantageous, because the fleece 30 then not only has a textile-like appearance but also feels like a textile felt after an appropriate finishing operation, for example after printing. This does not include the feeling that one has when squeezing a textile fabric lightly in the hand, but only the feeling obtained by stroking the stretched product with the fingertips.

Of course, it is also possible to use fabrics or knitted fabrics as a coating, in which especially glass fiber fabrics are advantageous if high demands are made on the flame-retardant properties, whereby the decorative effect of such glass fiber fabrics can easily be achieved. obtained by appropriate structuring of the fabric and any additional decorative treatment with dispersions. In addition, a so-called pigment printing can also be applied.

The invention is explained in more detail below with reference to examples.

A polyester fabric of the above-described type 2, which has a thickness of approx. 1 mm at a weight in the order of 160 g / m, is printed on one side in a known manner in such a way that a lightfast, friction-resistant finish a wallpaper-like washable surface is obtained which has a textile-like character.

This fleece is provided with a foam material on the back side in a device of the known type. The foam. has the following composition:

Parts by weight of SBR Latex (67%) 600

Polystyrene dispersion 80 20 (50%)

Potassium oleate (18%) 90

Water 20

Vulcanization paste 60 (55%) 25 Hollow spheres of aluminum silicon (Φ 10-75 μ) 200

Phenolic Protection Against Aging 3.2 30 Can be used as hollow spheres, which are commercially available under the brand name "Fillite" from Fillite (Runcorn) Ltd.,

England, or under the trade name "Armospheres" owned by Georg M. Langer & Co., Germany. The spheres are preferably filled with CO2 and nitrogen, which increases the flame retardant property and the heat insulation of the final product.

The said components are foamed in a conventional manner in a mixer and then applied to the back of the web through a static mixer, adding ammonium acetate or sodium silicon fluoride as the gelling agent for the static mixer. To accelerate the gelling process, the foam applied by means of an iron knife of the desired thickness is passed together with the underlying fleece under a field of infrared radiators, after which the product obtained is vulcanized through an oven. The foam can also be produced by a non-gel method, wherein in the above composition 10 the potassium oleate is replaced by a synthetic soap, for example the sodium salt of a sulfosuccinate.

The product is then vulcanized in an oven in the usual manner. The thus obtained foam with a thickness of, for example, 5 mm, is firmly bonded to the fleece, has a high recovery capacity, has the softness of soft rubber and offers an ideal base layer for sticking the composite wall covering material to a wall.

The hollow spheres of aluminum silicate serve as a stiffening filler, which does not decrease but even improves the insulating effect.

The hollow spheres can be filled with CO2 and N2, which increases the flame-retardant property and the insulating capacity.

The alumina hydrate mentioned in the above composition serves simultaneously in the present case as a filler and as a flame retardant.

Of course, a foam material of the type mentioned can also have certain deviations in composition, with particular reference being made to the fact that the foam material can be dyed if desired, although, as a rule, with a non-woven material of the type mentioned, a white foam material is transparent. is not expected and would not disturb.

A foam of such a composition can also be applied to a fabric or knit, which is decorative in its structure and / or coloring, in particular by printing on the surface. A particularly great flame-retardant effect is obtained if a product consisting at least predominantly of glass fibers 800 0 9 17 - 6 - is used as the covering layer, wherein non-woven fabrics, but preferably structured woven textile weaving requirements, are also used. The surface of such a glass fiber product can be provided with a decorative pattern by the so-called pigment printing method. However, it is also possible to apply flame-resistant dispersions.

It follows from the foregoing that it is possible to use insulating or insulating materials which are advantageous in the price with simple means. sound-absorbing, flame-resistant 10 resp. manufacture non-flammable wall coverings with a decorative appearance, which can be easily applied to a wall with tightly fitting clean joints.

The drawing shows a side view of a part of a web of a wall covering material according to the invention.

The wall covering material has a covering layer 1, which consists of a fleece of the above-described type with a thickness of approximately 1.1 mm. The covering layer 1 is intimately connected with a foam layer 2, which is foamed on the back side 20 of the covering layer 1, gelled thereon and vulcanized. The foam layer 2 has a thickness of the order of 4 mm and a soft-rubber-like consistency.

The relatively smooth surface 11 of the covering layer 1 is provided with a pattern which is obviously not visible in the drawing. Moreover, the surface can be structured, for example by pressing or otherwise, or can only have such a structuring without printing. The back 21 of the foam layer 2 is relatively smooth, so that the fine pores can only be observed at a small distance when viewed. This is required for sticking the wall covering material to a wall, because the adhesive, if any, applied on the back side 21 then forms a good adhesion with the porous foam layer 2, but cannot penetrate so deeply into the foam material that its proper functioning is adversely affected. The hollow grains are indicated in the foam layer 2 by the points 22 drawn. However, the number of points drawn is not representative.

8000917

Claims (8)

1. Wall cladding material with a rear, wall-facing, flame-retardant aggregates containing elastic, gas-permeable foam layer and a front, fiber-containing, surface facing when used by the viewer, the whole being heat-insulating, sound-absorbing and has flame-resistant properties, characterized in that the foam layer (2) contains hollow spherical granules (22) of an inorganic closed-cell material in an open-cell foam. Wall covering material according to claim 1, characterized in that the granules are formed by hollow spheres (22), which are at least largely filled with an inert gas. 15 3 *. Wall covering material according to claim 2, characterized in that the inert gas is nitrogen and / or carbon dioxide. Wall covering material according to claim 1, 2 or 3, characterized in that the hollow spheres (22) have a grain size distribution in the range from 10 to 300 µ, in particular up to 75 µ. Wall covering material according to any one of the preceding claims, characterized in that the foam material has a high recovery capacity after deformation. Wall covering material according to claim 5, characterized in that the foam material contains a vulcanized product of a styrene-butadiene latex (SRB-Latex). Wall covering material according to any one of the preceding claims, characterized in that the foam layer contains aluminum oxide hydrate. Wall covering material according to any one of the preceding claims, characterized in that the covering layer consists of a fleece, in particular a fleece of polyester fibers. Wall covering material according to any one of claims 1 to 7, characterized in that the covering layer 800 0 9 17 - 8 - at least largely consists of glass fibers and is preferably a glass fiber fabric. 10. Wall covering material according to any one of the preceding claims, characterized in that the covering layer has a decorative working surface. 8000917